Wires the birth-refusal check into capsule_birth_baby(): calls vm_registry_live_count() (added in the prior WIP commit) between capsule validation and vm_registry_alloc(), returning the new CAPSULE_RUN_ERR_FLEET_FULL and logging via capsule_parity_log_birth_failed() before any EMBRYO registry slot is consumed. Also fixes a gap in that WIP commit: STADIUM_MAX_VM_COUNT was only ever defined via a Kconfig .config-driven -D flag, with no fallback default the way every sibling knob in starforth_config.h has -- a build with no .config present (this one) failed with the macro undeclared. Added STARFORTH_CONFIG_STADIUM_MAX_VM_COUNT_DEFAULT (4, matching Kconfig.kernel) following the existing HEARTBEAT_INFERENCE_FREQUENCY pattern exactly. All three architectures boot clean to ok> with dict_hash=0x3d4e1daf289da94f, matching the item-0.10/2.1 baseline. FABRIC.md item 2.2 checked off. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
capsules/
FORTH personality files loaded by the VM at boot. A capsule is an immutable, content-addressed payload; its XXHash64 hash is its identity. Any mutation changes the hash and the birth protocol rejects the image.
Key files
| File | Type | Purpose |
|---|---|---|
init.4th |
(m) MAMA_INIT |
Default Mama VM personality — loaded at LBN 2048 |
ACL.4th |
user | Word-level ACL system; self-activating at boot |
zuse.4th |
user | Bootstrap superuser; loaded by ACL.4th |
doe.4th |
user | DoE workload words (EXEC-DOE) — opt-in |
init-0.4th … init-9.4th |
(p) |
Numbered personality variants |
init-l8-*.4th |
(p) |
L8 Jacquard mode variants (stable/volatile/diverse/temporal/transition/omni) |
hermes/init.4th |
(p) |
Hermes baby VM personality |
artemis/init.4th |
(p) |
Artemis baby VM personality |
Block namespace
Block ranges are shared across all loaded capsules — collisions cause silent word-definition overwrites.
| Range | Owner |
|---|---|
| 2048–2099 | init.4th |
| 2100–2199 | doe.4th |
| 3000–3999 | workload capsules |
| 4000+ | user-defined (ACL.4th, zuse.4th, …) |
Each block is limited to 1024 bytes. Verify with wc -c before committing.
See also
experiments/bare_metal/README.md— DoE protocols and block namespace rulesdocs/03-architecture/word-acl/DESIGN.md— ACL system designtools/mkcapsule.c— assembles capsules intocapsule_generated.c- Project root